While updating how to add record if not found?

[kingsanu]

await DB.Update<Author>()
        .Match(a => a.Surname == "Stark")
        .Modify(a => a.Name, "Brandon")
        .Modify(a => a.Surname, "The Broken")
        .ExecuteAsync();

i using Update method, but that entity is not found in database, so how can i add that entity if update not able to find record?

[dj-nitehawk]

https://www.mongodb.com/docs/v7.2/reference/method/db.collection.update/#std-label-update-upsert

await DB.Update<Author>()
        .Match(a => a.Surname == "Stark")
        .Modify(a => a.Name, "Brandon")
        .Modify(a => a.Surname, "The Broken")
        .Option(o => o.IsUpsert = true) //specify update options - upsert
        .ExecuteAsync();